Screw or nut and a captive washer

Details Screw or nut and a captive washer Screw or nut and a captive washer

1977-09-12

1978-10-31

McGlynn, Joseph H.

Geometrical instruments

10155R, 85 50R, 339263R, H01R 910

Patent

active

041231325

ABSTRACT:
A captive washer and threaded fastener combination. The washer has a non-planar apertured portion, for passage of a screw shank, which is plastically deformed on first tightening of the fastener. The plastic deformation causes further extending portions of the washer to engage a shoulder on the screw or nut, and hold the washer captive.

REFERENCES:
patent: 721559 (1903-02-01), Goodridge
patent: 3144803 (1964-09-01), Briles
patent: 3930706 (1976-01-01), Obuch
patent: 3993397 (1976-11-01), Gutshall

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